Home / 28,772.49-43,140.28-19,862.86

Finding the Fourth Proportional to 28,772.49, 43,140.28 and 19,862.86

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Solution

The fourth proportional to 28,772.49, 43,140.28 and 19,862.86 is: 29,781.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,772.49 : 43,140.28 = 19,862.86 : x
  2. Step 2: Convert to fraction form
    28,772.49/43,140.28 = 19,862.86/x
  3. Step 3: Cross multiply
    28,772.49x = 43,140.28 × 19,862.86
  4. Step 4: Simplify right side
    28,772.49x = 856,889,325.75
  5. Step 5: Solve for x
    x = 856,889,325.75/28,772.49
  6. Step 6: Final answer
    x = 29,781.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.